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How to maintain the photovoltaic power station?
- Jul 05, 2018 -

While the household photovoltaic power station brings convenience to us, how can we maintain the service life of the PV module?

household photovoltaic power station.jpg

1. Keep ventilation

  Regardless of the components or the inverter, the distribution box should be kept ventilated to ensure air circulation. It is important not to arrange the arrangement of the PV power plant components reasonably for the purpose of generating more power, causing the components and components to block each other and affecting the heat dissipation and ventilation, resulting in low power generation.

  For the owners of photovoltaic agricultural greenhouses, ventilation should be considered. Ventilation can be set in the blind area of the back of the greenhouse, so as not to affect the crop growth conditions, it is suitable to ensure the temperature of the photovoltaic power plant operating environment to the greatest extent.

2. Timely clean up

  To avoid affecting the heat dissipation of the photovoltaic power station, it is necessary to ensure that the photovoltaic modules, inverters, and distribution boxes are wide open, and if there are debris accumulation, clean up in time. Because the photovoltaic panel is exposed for a long time, it will inevitably be exposed to dust. The temperature of the part covered by the dust under the sunlight is much higher than that of the uncovered part, which will cause the temperature to be too high and the battery to burn out. Spot, the shaded photovoltaic cell will become a non-power generating resistor, consuming the power generated by the battery and generating heat, which is the "hot spot effect." It not only affects the amount of electricity generated, but also shortens the life of photovoltaic power plants.

3. Set up a parasol for the inverter distribution box

  Household inverters are generally IP65 rated, with a certain degree of wind, dust and water resistance. However, when the inverter and distribution box work, they must also dissipate heat, so install the inverter and distribution box. It is best to install it in a place where it is protected from rain and rain. If it must be installed in the open air, then make a simple awning for the inverter and distribution box to prevent direct sunlight. Avoid excessive temperature rise of the inverter and distribution box, which will affect the amount of power generation.

4. Deal with bad weather

  Users who install photovoltaic power stations must pay attention to the prevention of sudden disasters such as lightning, heavy rain, and hail.

1) Lightning strike

  If you want to protect against lightning, the most effective and widely used method is to connect the metal parts of electrical equipment to the earth. The connection part is welded or gas-welded. Soldering cannot be used. If the welding cannot be done at the site, riveting or bolting can be used. To ensure the contact surface of 10cm2 or more, the buried depth of the grounding body is preferably 0.5~0.8m.

2) Rain

  If your roof is a sloping roof, don't worry about it. If your home is a flat roof, it is best to consider the drainage problem when designing and installing the PV power plant. Avoid when the rainfall is too large, because the flat roof bracket is installed relatively low, so that the photovoltaic modules are soaked by rain.

During the inspection after the rain, do not directly touch the connection between the inverter, the PV module and the power supply cable by hand, and bring rubber gloves and rubber boots.

3) Hail

  Factory-installed PV modules are typically subjected to hail at 23 m/s, so hail does not generally affect PV modules. However, after the hail, daily inspections are indispensable. If the photovoltaic power station has a significant drop in power generation or other abnormal conditions after the hail, the owner must promptly notify the factory after-sales personnel to conduct the test. When inspecting a photovoltaic module, the thermal imaging portion is generally used to lock the heat generating portion, or the disconnection detector is used to check the disconnection portion and the bypass diode failure. If the power generation is significantly reduced or other abnormal conditions occur after the components are smashed, the user should promptly notify the maintenance personnel to check the PV system, and if necessary, return it to the original factory for testing, so as to replace the damaged PV modules in time.